IOTA/IOTA-ES occultation update for (76) Freia / TYC 5239-00971-1 event on 2012 Nov 14, 03:36 UT Visible from Brazil, Peru Summary ------- On 2012 Nov 14 UT, the 201 km diameter asteroid (76) Freia will occult a 10.1 mag star in the constellation Aquarius for observers along a path across Brazil, Peru. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 13.9 mag (the magnitude of the asteroid) for at most 31.0 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2012 Nov 14, 03:33 - 2012 Nov 14, 03:52 UT * geocentric midpoint of event [JD]: 2456245.6507 * magnitude of target star: 10.1 * magnitude drop [mag]: 3.8 * estimated maximum duration [s]: 31.0 * Moon: 0 % sunlit, 103° distance * Sun: 106° distance * rough path description: Brazil, Peru The occultation path -------------------- * approximate projected width [km]: 213 * 1 sigma uncertainty interval [path widths]: +/- 0.26 * 1 sigma uncertainty interval [seconds]: +/- 9.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .023", 84° ) * approx speed of asteroid's shadow [km/s]: 6.4734 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5239-00971-1 by 76 Freia on 2012 Nov 14 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude -136 0 0 -29 5 23 3 33 35 67 22 -1 -30 4 46 -28 6 21 -30 35 47 -27 35 47 -135 0 0 -28 53 1 3 33 51 67 19 -2 -29 52 27 -27 53 56 -30 23 31 -27 23 21 -134 0 0 -28 40 27 3 34 7 68 17 -2 -29 39 56 -27 41 19 -30 11 1 -27 10 42 -133 0 0 -28 27 40 3 34 24 68 14 -3 -29 27 13 -27 28 29 -29 58 19 -26 57 51 -132 0 0 -28 14 41 3 34 40 69 11 -4 -29 14 17 -27 15 27 -29 45 25 -26 44 47 -131 0 0 -28 1 30 3 34 57 69 9 -5 -29 1 8 -27 2 13 -29 32 18 -26 31 31 -130 0 0 -27 48 6 3 35 13 69 6 -6 -28 47 48 -26 48 46 -29 19 0 -26 18 3 -129 0 0 -27 34 32 3 35 30 70 3 -7 -28 34 17 -26 35 8 -29 5 30 -26 4 24 -128 0 0 -27 20 45 3 35 46 70 360 -8 -28 20 33 -26 21 19 -28 51 48 -25 50 33 -127 0 0 -27 6 48 3 36 3 70 356 -9 -28 6 39 -26 7 19 -28 37 55 -25 36 31 -126 0 0 -26 52 39 3 36 20 70 353 -10 -27 52 33 -25 53 8 -28 23 51 -25 22 18 -125 0 0 -26 38 20 3 36 37 70 350 -11 -27 38 17 -25 38 46 -28 9 37 -25 7 55 -124 0 0 -26 23 51 3 36 54 71 347 -12 -27 23 50 -25 24 13 -27 55 11 -24 53 21 -123 0 0 -26 9 11 3 37 11 71 343 -13 -27 9 13 -25 9 31 -27 40 36 -24 38 38 -122 0 0 -25 54 22 3 37 28 70 340 -14 -26 54 27 -24 54 39 -27 25 51 -24 23 44 -121 0 0 -25 39 23 3 37 45 70 337 -15 -26 39 30 -24 39 37 -27 10 56 -24 8 41 -120 0 0 -25 24 14 3 38 3 70 334 -16 -26 24 25 -24 24 27 -26 55 51 -23 53 29 -119 0 0 -25 8 57 3 38 20 70 330 -17 -26 9 10 -24 9 7 -26 40 38 -23 38 8 -118 0 0 -24 53 32 3 38 37 70 327 -18 -25 53 47 -23 53 39 -26 25 16 -23 22 39 -117 0 0 -24 37 58 3 38 54 69 324 -19 -25 38 15 -23 38 3 -26 9 45 -23 7 2 -116 0 0 -24 22 16 3 39 11 69 321 -20 -25 22 35 -23 22 19 -25 54 7 -22 51 17 -115 0 0 -24 6 26 3 39 29 69 319 -21 -25 6 48 -23 6 27 -25 38 21 -22 35 24 -114 0 0 -23 50 30 3 39 46 68 316 -22 -24 50 53 -22 50 29 -25 22 27 -22 19 25 -113 0 0 -23 34 26 3 40 3 68 313 -23 -24 34 52 -22 34 24 -25 6 27 -22 3 19 -112 0 0 -23 18 17 3 40 20 67 311 -24 -24 18 44 -22 18 12 -24 50 20 -21 47 6 -111 0 0 -23 2 1 3 40 37 66 308 -25 -24 2 30 -22 1 55 -24 34 7 -21 30 48 -110 0 0 -22 45 39 3 40 54 66 306 -26 -23 46 10 -21 45 31 -24 17 47 -21 14 24 -109 0 0 -22 29 12 3 41 11 65 304 -27 -23 29 45 -21 29 3 -24 1 23 -20 57 55 -108 0 0 -22 12 41 3 41 28 64 302 -28 -23 13 14 -21 12 30 -23 44 53 -20 41 21 -107 0 0 -21 56 5 3 41 45 64 300 -28 -22 56 39 -20 55 53 -23 28 19 -20 24 43 -106 0 0 -21 39 24 3 42 2 63 298 -29 -22 40 0 -20 39 12 -23 11 41 -20 8 2 -105 0 0 -21 22 41 3 42 19 62 296 -30 -22 23 17 -20 22 27 -22 54 58 -19 51 16 -104 0 0 -21 5 54 3 42 35 61 295 -31 -22 6 31 -20 5 39 -22 38 13 -19 34 28 -103 0 0 -20 49 4 3 42 52 61 293 -32 -21 49 42 -19 48 48 -22 21 24 -19 17 37 -102 0 0 -20 32 12 3 43 8 60 292 -33 -21 32 51 -19 31 56 -22 4 33 -19 0 44 -101 0 0 -20 15 17 3 43 25 59 290 -34 -21 15 57 -19 15 1 -21 47 39 -18 43 49 -100 0 0 -19 58 22 3 43 41 58 289 -35 -20 59 2 -18 58 5 -21 30 44 -18 26 53 - 99 0 0 -19 41 25 3 43 57 57 288 -36 -20 42 5 -18 41 8 -21 13 48 -18 9 56 - 98 0 0 -19 24 28 3 44 13 56 286 -37 -20 25 8 -18 24 11 -20 56 51 -17 52 59 - 97 0 0 -19 7 30 3 44 29 56 285 -38 -20 8 11 -18 7 14 -20 39 53 -17 36 2 - 96 0 0 -18 50 33 3 44 44 55 284 -39 -19 51 13 -17 50 17 -20 22 56 -17 19 5 - 95 0 0 -18 33 37 3 45 0 54 283 -40 -19 34 17 -17 33 20 -20 5 59 -17 2 9 - 94 0 0 -18 16 41 3 45 15 53 282 -41 -19 17 21 -17 16 26 -19 49 3 -16 45 14 - 93 0 0 -17 59 48 3 45 30 52 281 -42 -19 0 26 -16 59 32 -19 32 8 -16 28 21 - 92 0 0 -17 42 56 3 45 45 51 280 -42 -18 43 34 -16 42 41 -19 15 16 -16 11 30 - 91 0 0 -17 26 7 3 46 0 50 279 -43 -18 26 44 -16 25 53 -18 58 25 -15 54 42 - 90 0 0 -17 9 20 3 46 15 49 279 -44 -18 9 57 -16 9 7 -18 41 37 -15 37 57 - 89 0 0 -16 52 37 3 46 29 48 278 -45 -17 53 13 -15 52 25 -18 24 53 -15 21 16 - 88 0 0 -16 35 58 3 46 43 47 277 -46 -17 36 32 -15 35 47 -18 8 12 -15 4 38 - 87 0 0 -16 19 22 3 46 57 46 276 -47 -17 19 56 -15 19 13 -17 51 35 -14 48 5 - 86 0 0 -16 2 52 3 47 11 45 276 -48 -17 3 24 -15 2 44 -17 35 2 -14 31 36 - 85 0 0 -15 46 26 3 47 24 44 275 -48 -16 46 56 -14 46 20 -17 18 34 -14 15 13 - 84 0 0 -15 30 6 3 47 38 43 274 -49 -16 30 35 -14 30 1 -17 2 11 -13 58 55 - 83 0 0 -15 13 52 3 47 51 42 274 -50 -16 14 19 -14 13 48 -16 45 54 -13 42 43 - 82 0 0 -14 57 43 3 48 3 41 273 -51 -15 58 9 -13 57 42 -16 29 44 -13 26 38 - 81 0 0 -14 41 42 3 48 16 40 273 -52 -15 42 5 -13 41 42 -16 13 39 -13 10 39 - 80 0 0 -14 25 47 3 48 28 39 272 -52 -15 26 9 -13 25 49 -15 57 42 -12 54 47 - 79 0 0 -14 10 0 3 48 40 38 272 -53 -15 10 19 -13 10 4 -15 41 51 -12 39 3 - 78 0 0 -13 54 20 3 48 52 37 271 -54 -14 54 38 -12 54 27 -15 26 8 -12 23 27 - 77 0 0 -13 38 49 3 49 3 36 271 -54 -14 39 4 -12 38 57 -15 10 34 -12 7 58 - 76 0 0 -13 23 26 3 49 14 35 270 -55 -14 23 39 -12 23 37 -14 55 7 -11 52 39 - 75 0 0 -13 8 12 3 49 25 34 270 -56 -14 8 22 -12 8 25 -14 39 49 -11 37 28 - 74 0 0 -12 53 7 3 49 36 33 270 -56 -13 53 15 -11 53 22 -14 24 41 -11 22 27 - 73 0 0 -12 38 11 3 49 46 32 269 -57 -13 38 17 -11 38 29 -14 9 41 -11 7 35 - 72 0 0 -12 23 26 3 49 56 31 269 -58 -13 23 29 -11 23 46 -13 54 52 -10 52 53 - 71 0 0 -12 8 50 3 50 6 30 268 -58 -13 8 50 -11 9 13 -13 40 12 -10 38 21 - 70 0 0 -11 54 25 3 50 15 29 268 -59 -12 54 23 -10 54 50 -13 25 43 -10 24 0 - 69 0 0 -11 40 10 3 50 24 28 268 -59 -12 40 5 -10 40 38 -13 11 25 -10 9 50 - 68 0 0 -11 26 7 3 50 33 27 267 -60 -12 25 59 -10 26 38 -12 57 17 - 9 55 50 - 67 0 0 -11 12 15 3 50 41 26 267 -60 -12 12 4 -10 12 48 -12 43 21 - 9 42 2 - 66 0 0 -10 58 34 3 50 50 25 267 -60 -11 58 21 - 9 59 10 -12 29 36 - 9 28 26 - 65 0 0 -10 45 6 3 50 57 24 267 -61 -11 44 50 - 9 45 45 -12 16 3 - 9 15 1 - 64 0 0 -10 31 49 3 51 5 23 266 -61 -11 31 30 - 9 32 31 -12 2 42 - 9 1 49 - 63 0 0 -10 18 45 3 51 12 22 266 -61 -11 18 23 - 9 19 29 -11 49 33 - 8 48 49 - 62 0 0 -10 5 53 3 51 19 21 266 -62 -11 5 29 - 9 6 40 -11 36 37 - 8 36 2 - 61 0 0 - 9 53 14 3 51 26 20 266 -62 -10 52 47 - 8 54 4 -11 23 54 - 8 23 27 - 60 0 0 - 9 40 48 3 51 32 19 265 -62 -10 40 18 - 8 41 41 -11 11 24 - 8 11 5 - 59 0 0 - 9 28 36 3 51 38 18 265 -62 -10 28 3 - 8 29 32 -10 59 7 - 7 58 57 - 58 0 0 - 9 16 37 3 51 43 17 265 -62 -10 16 1 - 8 17 35 -10 47 3 - 7 47 2 - 57 0 0 - 9 4 51 3 51 48 16 265 -62 -10 4 12 - 8 5 53 -10 35 13 - 7 35 21 - 56 0 0 - 8 53 20 3 51 53 15 265 -62 - 9 52 38 - 7 54 24 -10 23 37 - 7 23 54 - 55 0 0 - 8 42 2 3 51 58 14 264 -62 - 9 41 17 - 7 43 9 -10 12 15 - 7 12 40 - 54 0 0 - 8 30 58 3 52 2 13 264 -62 - 9 30 11 - 7 32 8 -10 1 7 - 7 1 41 - 53 0 0 - 8 20 9 3 52 6 12 264 -62 - 9 19 19 - 7 21 22 - 9 50 14 - 6 50 56 - 52 0 0 - 8 9 35 3 52 10 11 264 -62 - 9 8 41 - 7 10 50 - 9 39 35 - 6 40 26 - 51 0 0 - 7 59 15 3 52 13 10 264 -62 - 8 58 19 - 7 0 33 - 9 29 11 - 6 30 10 - 50 0 0 - 7 49 9 3 52 16 9 264 -61 - 8 48 11 - 6 50 30 - 9 19 1 - 6 20 9 - 49 0 0 - 7 39 19 3 52 18 8 264 -61 - 8 38 18 - 6 40 43 - 9 9 7 - 6 10 22 - 48 0 0 - 7 29 44 3 52 21 7 263 -61 - 8 28 40 - 6 31 10 - 8 59 28 - 6 0 51 - 47 0 0 - 7 20 24 3 52 23 6 263 -60 - 8 19 17 - 6 21 52 - 8 50 3 - 5 51 35 - 46 0 0 - 7 11 19 3 52 24 5 263 -60 - 8 10 9 - 6 12 50 - 8 40 55 - 5 42 34 - 45 0 0 - 7 2 29 3 52 26 4 263 -60 - 8 1 17 - 6 4 3 - 8 32 1 - 5 33 48 - 44 0 0 - 6 53 55 3 52 27 3 263 -59 - 7 52 41 - 5 55 32 - 8 23 23 - 5 25 18 - 43 0 0 - 6 45 37 3 52 27 2 263 -59 - 7 44 20 - 5 47 15 - 8 15 1 - 5 17 3 - 42 0 0 - 6 37 34 3 52 28 1 263 -58 - 7 36 15 - 5 39 15 - 8 6 54 - 5 9 4 Uncertainty in time = +/- 9 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 5239-00971-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 37 06.5764 DE: -07 24 28.983 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .022 ) * V mag [mag]: 10.1 * B mag [mag]: 10.5 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (76) Freia approx. diameter [km]: 201 approx. diameter ["]: .091 distance from Earth [AU]: 3.05100 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1367 number of rejected observations: 179 time covered by the observations: 1911 Jul 21 - 2012 Oct 07 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.009, 69° remarks: * orbital elements for (76) Freia : Mean anomaly = 274.67747766 deg Arg. of pericenter = 253.57368526 deg Long. of node = 204.53268626 deg Inclination = 2.11790119 deg Eccentricity = 0.16445334 Semimajor axis = 3.41217747 AU Perihelion dist = 2.85103348 AU Mag: H = 7.88, G = 0.15 Epoch of elements : MJD 56245.15100000 TDT (2012 Nov 14.151) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 14 76 Freia 3h 37.0m UT 10.1 22 37 6.576- 7 24 28.98TYC 5239-00971-1 10.5 13.9 201 31.0 3.051 0.691 2.34 -128.6228 -7.409 121.86 -18.31 3.6168 0.07541 -0.32272 3.56323 0.80842 0.00541 0.00213 2000 273.872010201211 9.00000253.573685204.532686 2.1179010.16445334 3.4121775 2.8510335 7.9 5.00.15 RATE 1.5637120 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.027 0.023 84 1.26 0.023 0 0 4-3 056226.0020121114_0971-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 22:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org